Rotary cabinet with swivelled doors



C. C. GARDNER ROTARY CABINET WITH SWIVELLED DOORS Jan. 2a, 195

Fild Nov. 24. 1953 2 $he ets-$heet 1 Jan. 28, 1958 c. c. GARDNER ROTARY CABINET WITH SWIVELLED DOORS 2 Sheets-Sheet 2 Filed Nov. 24. 1953 IIIII United States Patent ROTARY CABINET WITH SWIVELLED DOORS Clair C. Gardner, Rockford, Ill. Application November 24, 1953, Serial No. 394,014 20 Claims. (Cl. 312-252) I This invention relates to a new and improved rotary cabinet with openable and closable swivelled doors, on the inner side of which articles, like magazines, for example, may be carried in suitable racks, the doors being operable automatically one way when the cabinet is turned in one direction, and the other way when turned in the reverse direction.

The principal object of my invention is to provide a cabinet of the kind mentioned that is of simple and economical construction and has a door operating mechanism of very compact design enabling placement of the cabinet in a small space, as, for example, under the low top of a coffee table.

The doors of the rotary cabinet carrying the racks or other supports on'their inner sides are swivelled on vertical axes at the middle of the door openings and are arranged to be opened automatically by a modified form of Geneva gear mechanism, namely, by engagement of dogs on the edges of the doors with teeth on a Switch plate mounted in the cabinet, this plate being provided at one station so that the doors are operated in sequence as they pass this station and as many may be opened or closed as the operator desires, according to how far the cabinet is turned, all of the doors being operated one way or the other in a complete revolution of the'cabinet.

The invention is illustrated in the accompanying drawings, in which- Fig. l is a side view on a small scale of a coffee table incorporating a rotary cabinet with swivelled doors made in accordance with my invention;

Fig. 2 is a horizontal section through the rotary cabinet taken on the line 22 of Fig. 1 on a larger scale, showing all of the doors except one closed, so as to indicate the easy accessibility of the magazines or other articles when a door is opened;

d Fig. 3 is a similar view illustrating the opening of a oor;

Fig. 4 is a vertical sectional detail on the line 4-4 of Fig. 2, and

Fig. 5 is a bottom view of one of the doors showing the door operating dog.

The same reference numerals are applied to corresponding parts throughout the views.

Referring to Fig. l, the reference numeral 4 designates a table top supported at its one end on a pair of legs 5 and having its other end portion supported on two pairs of legs 6 and 7, the lower ends of which rest on a bottom or base panel 8. The rotary cabinet of my invention is indicated generally by the reference numeral 9 and operates between the top 4 and base 8.

As appears in Figs. 2 and 3, the rotary cabinet 9 is herein illustrated as substantially square with bevelled corners as indicated at 10, and has door panels 11 mounted in openings in the four sides thereof to swivel on vertical axes at the middles of the panels defined by pegs 12 provided at the top and bottom of each panel in vertical 2,821,454 Patented Jan. 28, 1958 alignment with one another. 0n the inner side of each door panel 11 is a rack 11a or any other suitable support which when the door is opened by turning through 180 projects outwardly from the cabinet 9, as appears at the left in Figs. 2 and 3, so that the magazines or whatever is placed in or on the rack or other support will be readily accessible and may be easily removed and replaced. When the doors 11 are closed these racks or other supports are fully concealed and the cabinet therefore presents a very neat and attractive appearance. The turning of the door panels is accomplished by turning the cabinet 9 and, as will soon appear, the doors are arranged to be opened in succession as the cabinet is turned in a counterclockwise direction, as indicated by the arrow in Fig. 3. Because only one door is opened at a time, the operation requires very little effort on the part of the operator turning the cabinet, and there is the further advantage that when the article the operator is seeking is found after the opening of the first or second door there is no need of turning the cabinet farther and opening another door. Hence, in the long run a cabinet designed along these lines will have its mechanism subjected to much less unnecessary wear and tear and there is, therefore, less likelihood of the device getting out of order and failing to function properly. The pegs 12 are received in suitable bearing holes in the top and bottom of the cabinet 9 in the manner indicated at b in Fig. 4, where the cabinet bottom is designated by the numeral 13. The bottom 13 has a circular center hole 14 by means of which the cabinet 9 is swivelled and centered with respect to the base 8 by engagement with a circular plate 15 which has a central circular boss portion 16 fitting in the opening 14, as clearly appears in Figs. 2-4. The plate 15 is suitably secured by means of screws 17 to the base 8.

The door operating mechanism attends to the opening of the doors in succession as the cabinet 9 is turned in a counterclockwise direction, and the doors are closed in succession in the reverse order by turning the cabinet in a clockwise direction. This mechanism, as previously mentioned, is a modified form of Geneva gear mechanism and comprises an arcuate switch plate 18 having ar-cuate slots 19 and 20 in its opposite end portions arranged to pivot about the inner end of either of these two slots on screws 21 and 22 fastened to the plate 15, the slot 19 being struck on an arc with screw 22 as a center, and the slot 20 being struck on an arc with screw 21 as a center, so that slot 19 allows swinging movement with respect to screw 21 when screw 22 functions as the pivot for the plate, and slot 20 allows movement with respect to screw 22 when the screw 21 is functioning as the pivot. A guide rod 23 pivotally connected at its one end, as at 24, to the middle of the switch plate 18 has its other end slidable in a swivel bearing 25 carried on the plate 15, and this rod has a coiled compression spring 26 mounted thereon caged in compressed condition between the enlarged pivot end 24 and the swivel bearing 25 tending to urge the plate 18 normally outwardly toward engagement with whichever one of the dogs 27, that are provided on the bottoms of the door panels 11, is within the operating range of the switch plate 18. There are two oppositely curved teeth 28 projecting from the outer arcuate edge of the plate 18 and facing in opposite directions to cooperate with two teeth 29 provided on one end of each of the dogs 27, the right-hand tooth 28 cooperating with one of the teeth 29 in the opening of each door, when the teeth 29 are directed toward the left at the commencement of each door opening movement, as seen in Fig. 3. In the door closing movement it is the left-hand tooth 28 that cooperates with the other tooth 29 on each dog, because the dogs 27 under those conditions have the teeth 29 directed to the right, as indicated in Fig. 3, by the dot and dash line position of the one door. Obviously, therefore, once a door has been opened by counterclockwise turning of the cabinet the dog 27 for that door will ride past the teeth 28 idly if the cabinet is turned farther in the counterclockwise direction. However, when the cabinet is turned in the clockwise direction the first dog 27 encountering the left-hand tooth 23 on plate 18 causes the door 11 associated therewith to be closed by clockwise rotation through 180. The plate 15 has a circular periphery 30 matching the radius of the opposite sides 31 of the dogs 27 and the dogs slide along this circular periphery after passing the teeth 28 on the plate 18. The dogs face one way as they approach the plate and face in the opposite direction as they leave it. The plate 15 has a portion of its circular periphery cut away, as indicated at 32, under the plate 18, whereby to allow the dogs 27 to move in an are around the pegs 12 as a center in the opening and closing movements, the dogs after completion of an opening or closing movement sliding along the circular periphery 30 so as to hold the doors against turning in one direction about their pegs 12 as a center. Upstanding trim strips 33 fastened to the edges of the bottom 13 of the cabinet confine the dogs 27 and thereby hold the doors against turning in the opposite direction.

In operation, the magazines or whatever other articles are to be stored in the cabinet are placed in or on the racks 11a or other supports provided on the doors 11, and these doors are usually kept closed whenever the articles are not needed, so that they wont collect dust and the cabinet will present a neater appearance with these articles concealed. The operation otherwise is behevecl to be clear from the foregoing description except to point out that it is only when the toothed end 29 of a dog 27 engages a tooth 28 onplate 18 that these portions nterlock and remain so until the dog is turned around in turning the door associated with it. All of the doors w1ll be opened or closed in one complete turn of the cablnet. Opening of the doors requires counterclockwise turmng, closing requires clockwise turning. If the cabinet is turned farther in the same direction after all the doors have been opened or closed, the plate 18 is merely deflected out of the way against the action of spring 26, first by the pin 12 and then, when the tooth 28 slips off the pm, by the dog 27 behind it. This is illustrated partially in Fig. 2 where the plate 18 is shown deflected, pivoting on screw 22, against action of spring 26. Screw 21 serves as the pivot for the plate 18 when this operation occurs in the other direction.

It is believed the foregoing description conveys a good understanding of the objects and advantages of my invention. The appended claims have been drawn to cover all legitimate modifications and adaptations.

I claim:

1. In a cabinet of the class described, a rotary cabinet body mounted for rotation on a vertical axis relative to a supporting base therebeneath, said cabinet having a plurality of door openings provided in the side walls thereof in circumferentially spaced relation, a door in each of said openings swivelled on a vertical axis between its side edges, each door having on the bottom edge an operating dog of elongated form that is of the same concave curvature on each longitudinal edge and tapered toward one end and having the other end notched in the form of a V to define spaced pointed teeth, a stationary horizontal circular base plate on said base relative to the periphery of which the dogs are slidable by their one or the other curved longitudinal edge according to the position of the doors, said circular base plate having a portion of its circular periphery cut away where the dogs are movable inwardly relative to said base plate in reversing their positions with reversal of the doors, and a horizontal switch plate movably mounted over the cutout portion of said base plate having two oppositely directed teeth on one edge thereof arranged to engage the teeth on said dogs to turn the doors in sequence through from one position to another when the cabinet body is turned in one direction, and vice versa when the cabinet body is turned in the opposite direction.

2. A structure as set forth in claim 1 wherein said switch plate is elongated in a direction circumferentially of said base plate, said structure including spring means urging the switch plate radially outwardly relative to said base plate toward operative relationship to the dogs on the doors, said switch plate being oscillatable relative to said spring means and having a pivot projection on the base plate at each end of said switch plate engaging in an arcuate slot provided in the switch plate, said slots being each struck on an arc with the pivot projection at the other end of the switch plate as a center, whereby said switch plate is swingable about either pivot as a center when moving inwardly against the action of the spring means.

3. A structure as set forth in claim 1 wherein said switch plate is of elongated form in a direction circumferentially of said base plate and has an arcuate outer periphery concentric with the circular periphery of said base plate, a rod pivotally connected at one end to the inner edge portion of said switch plate at the middle thereof and slidably guided at its other end in a bearing on said base plate and having a coiled compression spring thereon acting between said bearing and said rod tending to urge said switch plate radially outwardly relative to said base plate toward operative relationship to the dogs on said doors, said switch plate being oscillatable relative to said rod and said rod being oscillatable relative to said bearing, said switch plate having a pivot projection on the base plate at each end of said switch plate engaging in an arcuate slot provided in the switch plate, said slots being each struck on an arc with the pivot projection at the other end of the switch plate as a center, whereby said switch plate is swingable about either pivot as a center when moving inwardly against the action of the spring means.

4. In an indexing mechanism, a circular plate relative to the circular periphery of which a number of circumferentially spaced pivoted members to be each indexed through 180 are movable in a circle, each of said pivoted members carrying an operating or indexing dog of elongated form that is of the same concave curvature on each longitudinal edge and tapered toward one end and having the other end notched in the form of a V to define spaced pointed teeth, said dogs being slidable by their one or the other curved edge along the periphery of said circular plate according to the indexed position of the members, said circular plate having a portion of its circular periphery cut away where the dogs are movable inwardly relative to the circular plate in reversing their positions with reversal of the indexing members, and a switch plate parallel to and covering the cutout portion of the circular plate and movably mounted with respect thereto, said switch plate having two oppositely directed teeth on one edge thereof arranged to engage the teeth on said dogs to index the members in sequence through 180 in one direction in the movement of said indexing members relative to the periphery of said circular plate in one direction, and vice versa.

5. A structure as set forth in claim 4 wherein said switch plate is elongated in a direction circumferentially of said circular plate, said structure including spring means urging the switch plate radially outwardly relative to said circular plate toward operative relationship to the dogs on the indexing members, said switch plate being oscillatable relative to said spring means and having a pivot projection on the circular plate at each end of said switch plate engaging in an arcuate slot provided in the switch plate, said slots being each struck on an arc with the pivot projection at the other end of the switch plate as a center, whereby said switch plate is swingable about either pivot as a center when moving inwardly against the action of the spring means.

6. A structure as set forth in claim 4 wherein said switch plate is of elongated form in a direction circumferentially of said circular plate and has an arcuate outer periphery concentric with the circular periphery of said circular plate, a rod pivotally connected at one end to the inner edge portion of said switch plate at the middle thereof and slidably guided at its other end in a bearing on said'circular plate and having a coiled compression spring thereon acting between said bearing and said rod tending to urge said switch plate radially outwardly relative to said circular plate toward operative relationship to the dogs on said indexing members, said switch plate being oscillatable relative to said rod and said rod being oscillatable relative to said bearing, said switch plate having a pivot projection on the circular plate at each endof said switch plateengaging in an arcuate slot provided in the switch plate, said slots being each struck on an arc with the pivot projection at the other end of the switch plate as a center, whereby said switch plate is swingable about either pivot as a center when moving inwardly against the action of the spring means.

7. A combination table and cabinet structure comprising a table top supported on depending legs, a-base panel attached to the lower end portions of certain of said legs and disposed thereby in spaced parallel relation to said table top, and a manually rotatable cabinet mounted for rotation on a vertical axis between the table top and base panel, said cabinet having a plurality of door openings provided in the side walls thereof in circumferentially spaced relation, doors swivelled in said openings, each door having an operating projection on one end, and door operating means engageable in sequence by the projections as the cabinet is turned in one direction to turn the doors through 180 from one position to another, and vice versa when the cabinet is turned in the opposite direction, said door operating means being located so that the turning of the doors occurs between and in spaced relation to the table legs.

8. In a cabinet ofthe class described, a rotary cabinet body mounted for rotation on a vertical axis relative to a supporting base therebeneath, said cabinet having a plurality of door openings provided in the side walls thereof in circumferentially spaced relation, a door in each of said openings swivelled on a vertical axis between its side edges, each door having on the bottom edge an operating dog of elongated form that is of the same concave curvature on each longitudinal edge and tapered toward one end and having the other end notched in the form of a V to define spaced pointed teeth, a stationary horizontal circular base plate on said base relative to the periphery of which the dogs are slidable by their one or the other curved longitudinal edge according to the position of the doors, said circular base plate having a portion of its circular periphery cut away where the dogs are movable inwardly relative tov said base plate in reversing their positions with reversal of the doors, a horizontal switch plate movably mounted over the cutout portion of said base .plate having two oppositely directed teeth on one edge thereof arranged to engage the teeth on said dogs to turn the doors in sequence through 180 from one position to another when the cabinet body is turned in one direction, and vice versa when'the cabinet body is turnedin the opposite direction, said dogs being arranged to slide along the circular periphery of said base plate after passing the switch plate to prevent turning of the doors about their swivel axes in one direction, and means on the cabinet defining shoulders to confine the dogs against movement radially outwardly relative to the circular periphery of said base plate to prevent turning of the doors about their swivel axes in the other directiom 9. In an indexing mecha ism, a circular plate relative to the circular periphery of which a number of circum ferentially spaced pivoted members to be each indexed through are movable in a circle, each of said pivoted members carrying an operating or indexing dog of elongated form that is of the same concave curvature on each longitudinal edge and tapered toward one end and having the other end notched in the form of a V to define spaced pointed teeth, said dogs being slidable by their one or the other curved edge along the periphery of said circular plate according to the indexed position of the members, said circular plate having a portion of its circular periphery cut away where the dogs are movable inwardly relative to the circular plate in reversing their positions with reversal of the indexing members, a switch plate parallel to and covering the cutout portion of the circular plate and movably mounted with respect thereto, said switch plate having two oppositely directed teeth on one edge thereof arranged to engage the teeth on said dogs to index the members in sequence through 180 in one direction in the movement of said indexing members relative to the periphery of said circular plate in one direction, and vice versa, said. dogs being arranged to slide along the periphery of said circular plate after passing the switch plate to prevent turning of the indexing members about their pivotal axes in one direction, and means defining shoulders to confine the dogs against movement radially outwardly relative to the periphery of said circular plate to prevent turning of the indexing members about their pivotal axes in the other direction.

10. A combination table and cabinet structure comprising a table top supported on depending legs, a base panel attached to the lower end portions of certain of said legs and disposed thereby in spaced parallel relation to said table top, and a manually rotatable cabinet mounted for rotation on a vertical axis between the table top and base panel, said cabinet having a plurality of door openings provided in the side walls thereof in circumferentially spaced relation, doors swivelled in said openings, each door having an operating projection on one end, door operating means engageable in sequence by the projections as the cabinet is turned in one direction to turn the doors through 180 from one position to another, and vice versa when the cabinet is turned in the opposite direction, said door operating means being located so that the turning of the doors occurs between and in spaced relation to the table legs, and means cooperating with the projections on the ends of the doors to prevent swivel movement thereof before and after the projections engage the door operating means.

11. In a cabinet of the class described, a rotary cabinet body mounted for rotation on a vertical axis relative to a supporting base therebeneath, said cabinet having a door opening provided in the side wall thereof, a door in said opening swivelled on a vertical axis between its side edges, said door having on the bottom edge an operating dog of elongated form that is of the same concave curvature on each longitudinal edge and tapered toward one end and having the other end notched in the form of a V to define spaced pointed teeth, a stationary horizontal circular base plate on said base relative to the periphery of which the dog is slidable by its one or the other curved longitudinal edge according to the position of the door, said circular base plate having a portion of its circular periphery cut away where the dog is movable inwardly relative to said base plate in reversing its position with reversal of the door, and a horizontal switch plate movably mounted over the cut-out portion of said base plate having two oppositely directed teeth on one edge thereof arranged to engage the teeth on said dog to turn the door through 180 from one position to another when the cabinet body is turned in one direction, and vice versa when the cabinet body is turned in the opposite direction.

12. A structure as set forth in claim 11, wherein said switch plate is elongated in a direction circumferenti'all'y of said base plate, said structure including spripg means urging the switch plate radially outwardly relative to said base plate toward operative relationship to the dogon the door, said switch plate being oscillatable relative to said spring means and having a pivot projection on the base plate at each end of said switch plate engaging in an arcuate slot provided in the switch plate, said slots being each struck on an arc with the pivot projection at the other end of the switch plate as a center, whereby said switch plate is swingable about either pivot as a center when moving inwardly against the action of the spring means.

13. A structure as set forth in claim 11, wherein said switch plate is of elongated form in a direction circumferentially of said base plate and has an arcuate outer periphery concentric with the circular periphery of said base plate, a rod pivotally connecting at one end to the inner edge portion of said switch plate at the middle thereof and slidably guided at its other end in a bearing on said base plate and having a coiled compression spring thereon acting between said bearing and said rod tending to urge said switch plate radially outwardly relative to said base plate toward operative relationship to the dog on said door, said switch plate being oscillatable relative to said rod and said rod being oscillatable relative to said bearing, said switch plate having a pivot projection on the base plate at each end of said switch plate engaging in an arcuate slot provided in the switch plate, said slots being each struck on an arc with the pivot projection at the other end of the switch plate as a center, whereby said switch plate is swingable about either pivot as a center when moving inwardly against the action of the spring means.

14. In an indexing mechanism, a circular plate relative to the circular periphery of which a pivoted member to be indexed through 180 is movable in a circle, said pivoted member carrying an operating or indexing dog of elongated form that is of the same concave curvature on each longitudinal edge and tapered toward one end and having the other end notched in the form of a V to define spaced pointed teeth, said dog being slidable by its one or the other curved edge along the periphery of said circular plate according to the indexed position of the member, said circular plate having a portion of its circular periphery cut away where the dog is movable inwardly relative to the circular plate in reversing its position with reversal of the indexing member, and a switch plate parallel to and covering the cut-out portion of the circular plate and movably mounted with respect thereto, said switch plate having two oppositely directed teeth on one edge thereof arranged to engage the teeth on said dog to index the member through 180 in one direction in the movement of said indexing member relative to the periphery of said circular plate in one direction, and vice versa.

15. A structure as set forth in claim 14, wherein'said switch plate is elongated in a direction circumferentially of said circular plate, said structure including spring means urging the switch plate radially outwardly relative to said circular plate toward operative relationship to the dog on the indexing member, said switch plate being oscillatable relative to said spring means and having a pivot projection on the circular plate at each end of said switch plate engaging in an arcuate slot provided in the switch plate, said slots being each struck on an arc with the pivot projection at the other end of the switch plate as a center, whereby said switch plate is swingable about either pivot as a center when moving inwardly against the action of the spring means.

16. A structure as set forth in claim 14, wherein said switch plate is of elongated form in a direction circumferentially of said circular plate and has an arcuate outer periphery concentric with the circular periphery of said circular plate, a rod pivotally connected at one end to the inner edge portion of said switch plate at the middle thereof and slidably guided at its other end in abearing on said circular plate and having a coiled compression spring thereon acting between said bearing and said rod tending to urge said switch plate radially outwardly relative to said circular plate toward operative relationship to the dog on said indexing member, said switch plate being oscillatable relative to said rod and said rod being oscillatable relative to said bearing, said switch plate having a pivot projection on the circular plate at each end of said switch plate engaging in an arcuate slot provided in the switch plate, said slots being each struck on an arc with the pivot projection at the other end of the switch plate as a center, whereby said switch plate is swingable about either pivot as a center when moving inwardly against the action of the spring means.

17. In a cabinet of the class described, a rotary cabinet body mounted for rotation on a vertical axis relative to a supporting base therebeneath, said cabinet having a door opening provided in the side wall thereof, a door in said opening swivelled on a vertical axis between its side edges, said door having on the bottom edge an operating dog of elongated form that is of the same concave curvature on each longitudinal edge and tapered toward one end and having the other end notched in the form of a V to define spaced pointed teeth, a stationary horizontal circular base plate on said base relative to the periphery of which the dog is slidable by its one or the other curved longitudinal edge according to the position of the door, said circular base plate having a portion of its circular periphery cut away where the dog is movable inwardly relative to said base plate in reversing its position with reversal of the door, a horizontal switch plate movably mounted over the cut-out portion of said base plate havin g two oppositely directed teeth on one edge thereof arranged to engage the teeth on said dog to turn the door through 180 from one position to another when the cabinet body is turned in one direction, and vice versa when the cabinet body is turned in the opposite direction, said dog being arranged to slide along the circular periphery of said base plate after passing the switch plate to prevent turning of the door about its swivel axis in one direction, and means on the cabinet defining shoulders to confine the dog against movement radially outwardly relative to the circular periphery of said base plate to prevent turning of the door about its swivel axis in the other direction.

18. In an indexing mechanism, a circular plate relative to the circular periphery of which a pivoted member to be indexed through 180 is movable in a circle, said pivoted member carrying an operating or indexing dog of elongated form that is of the same concave curvature on each longitudinal edge and tapered toward one end and having the other end notched in the form of a V to define spaced pointed teeth, said dog being slidable by its one or the other curved edge along the periphery of said circular plate according to the indexed position of the member, said circular plate having a portion of its circular periphery cut away where the dog is movable inwardly relative to the circular plate in reversing its position with reversal of the indexing member, a switch plate parallel to and covering the cut-out portion of the circular plate and movably mounted with respect thereto, said switch plate having two oppositely directed teeth on one edge thereof arranged to engage the teeth on said dog to index the member through 180 in one direction in the movement of said indexing member relative to the periphery of said circular plate in one direction, and vice versa, said dog being arranged to slide along the periphery of said circular plate after passing the switch plate to prevent turning of the indexing member about its pivotal axis in one direction, and means defining shoulders to confine the dog against movement radially outwardly relative to the periphery of said circular plate to prevent turning of the indexing member about its pivotal axis in the other direction.

19. A combination table and cabinet structure comprising a table top supported on depending legs, a base panel attached to the lower end portions of certain of said legs and disposed thereby in spaced parallel relation to said table top, and a manually rotatable cabinet mounted for rotation on a vertical axis between the table top and base panel, said cabinet having a door opening provided in the side wall thereof, a door swivelled in said opening having an operating projection on one end, and door operating means engageable by the projection as the cabinet is turned in one direction to turn the door through 180 from one position to another, and vice versa when the cabinet is turned in the opposite direction, said door operating means being located so that the turning of the door occurs between and in spaced relation to the table legs.

20. A combination table and cabinet structure comprising a table top supported on depending legs, a base panel attached to the lower end portions of certain of said legs and disposed thereby in spaced parallel relation to said table top, and a manually rotatable cabinet mounted for rotation on a vertical axis between the table top and base panel, said cabinet having a door opening provided in the 10 side wall thereof, a door swivelled in said opening having an operating projection on one end, door operating means engageable by the projection as the cabinet is turned in one direction to turn the door through 180 from one position to another, and vice versa when the cabinet is turned in the opposite direction, said door operating means being located so that the turning of the door occurs between and in spaced relation to the table legs, and means cooperating with the projection on the end of the door to prevent swivel movement thereof before and after the projection engages the door operating means.

References Cited in the file of this patent UNITED STATES PATENTS 234,461 Dodge Nov. 16, 1880 343,041 Little June 1, 1886 865,356 Carr Sept. 10, 1907 865,984 Appelby Sept. 17, 1907 981,529 Cantrell Jan. 10, 1911 20 1,127,942 Theofanidis Feb. 9, 1915 2,017,189 Van Dyken Oct. 15, 1935 

